In this low power picture of the ovary (8x) you can see the relative
sizes of two mature secondary follicles and that of an early secondary
follicle with a small antrum. In large follicles the oocyte may not be
present in the section due to the plane of section. Very large mature
follicles, as those seen shortly before ovulation, are also known as
Graafian follicles. PK4892-24. Original mag. 8x. H&E. Secondary
follicles. Cortex. Ovary. Female Reproductive System. Cat.